Muffler.



PATENTED JULY 2, 1907.

MUFFLER.

APPLIGATION FILED JAN. 19 1907.

' tUN'rnD STATES'PATENT OFFICE.

CARL o. I-IEns'rnoM, oF sPRINGruslin),'v MASSACHUSETTS.

' iutnssmsn. 4 i No. 358,455. specification of Letteren/tent. .Patented July e, 1907.

- afiputamu nel January 19,1907. serai No. 353,119.

ber w that vcommunicates with the annular chamber m HEns'rRoM, a citizen of by means of the perforations a: in the piece r. The the United States o America, residing at Springfield, chamber w communicates with the outer end 4ofthe t in the county oi Hampden' and State of Massachusetts, pipe b by means o theperlorations d in the crimped. (i0 5 havo-invented new a d useful Improvements in Mufdisk r heretofore referred to. The disk 'r is' secured 11ers-, of which the'ollowing is a specification. A iii place on the pipeb by means oi a pin y that is driven This invention ,relates to -rnufilers and particularly through the openings z near the outer end of the pipe b. to the kindcmployedin connection with internal com- 3 designates a cap-piece secured on the end oi'the bustion engines furthe purpose oi reducing the noise pipe b by means of threads and engages the flanged head G 5 Al caused by the exhaust of the products oi combustion, tat the point 4, asshown. l ,and also to lessenlas much as possible the back pressure designates an exhaust gate pivoted at the point 6 to I caused by the exhaust. V the aged' head t and is plovided with a cut-out part 7 One ofthe objects of the-invention is to provide means the center of tli'e gate being slightly enlarged, asA shown for. varying tho amount o opening which communicates at 8, for completely covcring'the opening 9 inthcend of Y70 v 15 with the interior of the muffler and the'external atthe cap-piece. The outer end of the gate operatc's befA inosphere; another object is to increase as much' as posncath the spring arch-'shaped piece 10 that is secured to sible the volume oi the exhaust 'gases by allowing them thehead t by means of the screws-1l and l2 so that the' F- to owthrough aseries of apnular chambers oppasaga gat/e5 can be retained' in any desired position for vary-4 ways whereby the. back pressure is greatly 'riidpeedp- 4ing the amountp'i" 9; The full line-position oi 7 5 and at the same time lesseningthe noise oi thev escaping 1 the 'gate 5 in Fig. 2 shows'this opening completely cov- 1 I ered by the gate 5,"while the dotted line position shows .the openirig-9 partially uncovered.. i

A13 designates -the path followed the products of combustion alter they Ieavethe pipe lt by means of the `8 0 openings e.v It will be noticed that these openings are' located at the outerend of-the'pipeand pernritthe prod-A ucts of combustion to flowinward throughrhe annular chamber e and through the openings h into the chamber` r f, as designated by the arrows 14.A From 'this point the v85 products oi combustion How toward the outer end of the annular chamberfand-throughthe openings j into the annular lchamber k, as designated Aby the arrows 515.-

l From this point the productsf combustion llow inward Toullabham 'itmay concern.' lire it knownthat I, CARL O:

with thaeobicts in View, 1 have provided a Bouc:

ture that simple and economical in construction and lone that f natisfactorily' overcomes the olectionable '25 features ofthe'prior art,

' In the drawings forming part oithis application,-

. Figure 1 is a longitud' al, sectional view of the mulder 'on theline 1;-51 'o Fig. 2. Fig. 2 is an end elevation oi' iig.V 1' 'show-ing clearly the meansl for vregulatingthe 3()v 'exhaust orvaryng -the amount of hack pres- Re'ringto the drawings, a designates a pipe connected with the exhaust ports of an internal combustion engine'; b designates an inner tube or pipe secured to 3 5 the pipe. a in any suitable manner, as shown; this pipe b is provided with two series of perforations c and dwhichtcommunicate :with an annular chamber eV ex- .ternal of the pipe b'.' This chambei -is. separated from the succeeding annular chamber] by means of the 40 circular partition or wall g and is provided with a series oiperorations h in one e 'd thereof.`

along the passage or annular chamberc to the 'opening n '90 in thecircular partition'o to the outer annular chamber m, as designated by the arrows 16. From this point the products of combustion flow outward in. the annular chamber m and through the openings l? inthe crimped head '1' and into the annular chamber tu, as dcsignat d v 95 by the'arrow-18 From the annular chamber w the `products of combustion pass through the perforations' d and outward through the opening 9 to the atmosphere, as designated bythe arrpwsl,

It will be seen,that bymeans oi thisconstruction the 100 products of combustion are permitted to contiuupusly expand ironione chamber' to the succeeding chamber thus loweringthe pressure, and by vmeans of the circuitous passage-ways the noise is greatly reduced and the rate of discharge through the opening 9 can be suiti' 105 ably varied by means oi the exhaust gate 5, as readily understood. .1' i

It is understood that the gate 5 can, iioccasion re qujree, be opened and closed by the operator when the @Surrounding and' exterior to the annular chamber f is a circular partition or wall 'i provided with a series oi .periorations j near one end thereof, and surrounding the circular wall partitio'n'i is the chamber k that conirnuiicates with an anula chamber m exterior thereto, bymeans oi the perfor-ations n,-the chambers Ic and m being means o the circular wall or partition o. Surrounding the annular chamber m .50 is the circular outer wall or casing p. 1

- The circularwalls g, t, o and p are secured or retained in piace by msnsofrherwo crimpd cramped pieces q and .1 which are, in turn, secured tothe pipe bby 'means of the hanged heads s and t that haye the in# 'machine is running, by providing attaching connecting 110 turned tight tting anges u and o. Located betweem mean! to the tree end 'ofthe gate 5, and also the oper.

the piece r and the flanged head' tis an annular cham can, ifinecesaary, opening thegte, permit full vWidt-h of the vburned'gages to pass directly' through the' What/I claim, isz

` In u devicewot the clues described. au for receiving theproducts ot combustion,

exhnust pipe an inner pipe -secured to the same. and provided with two seis of pex-,

for retaining 'the gute in diiereni Ywhereby the products of series of openings in the outer end o! the -inner pipe .whereby the products ot combustionure successii'eiy ex.

a adjusted posiions combnstion which pass through the inner pipe may be varied, as des'cribed. I

- CARL 0.4Hnn'sTnoM. 

